Planer



May 19, 1931.

F. H. HOWLETT PLANER Filed Nov. 1'?, 1928 2 Sheets-Sheet 2 NVENTOR.

q) o5 BY @im ifm Mm ATTORNEYS.

NGN

Patented Mayg1`9, 1931 UNI-.TED si@-` FRANK n. HowLE'rT, or OAKLAND, cnriironnni, `Assienon To FRED ixrormsoiam',r or? P1,fllT` GFFICE "SAN, rRANcIsoo, CALIFORNIA Applica/snmeanwmbr 17, kk192s. seria-1m. 320,199.

This invention relates to planers, and'espe cially to a smallfportable-plane'r to be used for shavin Vorplaning*plaster casts such as'V character described; to'A provide a" smallr power driven portableI planer, particularly adapted for laboratory use and in which the: objectl to zbe planedis fed-by hand Vas thev planingv operation? takes place; to provide a planer head havinga face through which projects'a planer vknife and'against. which face the-work is heldduring the planing op.

eration ,'Tto provide an adjustabletal'iledis-y posed in front of the planer to assist 1n sup-V- porting' the yworkfduring the planing operation; to/,provide means wherebythetable may be angularly positioned' and securedv withV relation to the planer; to provide means for trapping and discharging'the {shavingsy or vcuttings removed by theplaner, soas to pression ofthe oral cavity. Y,

` The 4planer is lshownby way of illustration in the accompanying drawings, in which :Y Y Figrlfis aside elevation of the planen@ iFig. 2 is ai front view ofthe planer,

Fig. 3 Vis a detailed view showing the plaster cast in positionon theta-ble, ready for planing,

Figli shows a modification of K4planer head in which the planer knife is disposed on an angle,

Fig. v5` is a central vertical longitudinal',

view taken on' line V-eV, Figi'6;Y l' l' x Fig. 6 is a plan view'of the planer, Fig. 7 is -a'rrear view of the Vplaner head showing thelmanner of attaching the :planerV knife thereto.;l ,o

Referring 4to the drawings in detail, parz, ticularly Figsl and 2,..A1indicates azrnain5 base plate orfr'ameuponwhich is supported f and ydust will be discharged therethrough,

atable B and-a planer headC. The rear end of the base is provided with a vertical bracketv or extension 2, the upperk end of which terminatesin-lugs 3, the lugs 3 being interspaced,

as shown, and they form supports for the 'up-f 5 Y' vper ends of a pairof standards or cross-head guides 4, the lower ends of `which. are securedv inthe base at the point 5; f

v v The planer or cross-head C is reciprocally mounted on' the guides 4. The planer head consists of a substantially rectangular shackle plate or casting 6, the opposite sides of which are drilled fand .hushed vto permit the guides 4 to extend therethrough. The plate 6 is providedfwith` a yhorizontally vdisposed slot 7, and

inclined as'indicated at S, see V5, to resharpened, as at 10,*and projects a slight dis-y ,tance through the slot'f, the distance being y equal to the thickness or depth ofthe cut desired.` jThe blade may be secured to the rear. inclined surface of the planer head or plate 6" 'many suitable manner, for. instance, as 'here shown by slotting the upper edge of the blade as'indicated at Vl1, rand by passing securingv bolts therethrough, as indicated'at 12. The rear face of the planer head or plate 6 is ref"y cessed, as'indicated at 13,` and the' recesses form ashoulder or support fora cover platey 14, which may be secured in anyl suitable mannenas by screws 15.r o. A chamber 16 isI formed between the plate '15v and the forward face ofthe planer, and this space serves toreceive and discharge the shavings and dust rel moved bythe knife, Y

in alignment with the Vlower end of the planer head, and as the planer will, under ordinary conditions, be placed on a table or like support,.anopening may be formed therein in register' with theopening 17 so that shaving's therebypreyenting contamination of the sur rounding atmosphere, In fact,-du'st maybe entirely eliminated by moistening or slightly wettingvtheplaster cast before the shaving operation, as will hereinafter be described.

A reciprocal movement is transmittedy to 100 the face of the plate'rearwardly of the slot isl the planer head when it is in operation in the following manner. Journalled in the bracket 2 is a shaft 18, which is driven from any suitable source of power through means of a pulley 19 or the like. Formed on the inner end of the shaft 3 is a crank disc 20, and secured thereon is a. crank pin 21. Secured at the upper end of the planer head is a pin 22 and connecting the pin 22 and the crank pin 21 is a pitm'an or connecting rod 23. Hence, when shaft 18 is rotated, a reciprocal movement will be transmitted to the planer head. The table B, upon which the plaster cast is supported is mounted and secured in thefollowing manner. Formed on the base A are a pair of'l bearing lugs 24, Y and extending through said lugs and similar lugs formed on the lower surface of the table isa bearing pin 25. This pin forms a pivotal support for the inner end of the table and the outer end mayr thus be raised so that the surface of the table may assume any inclined or angular position desired, with relation to the planer head. In `most instances the table WillV assume a horizontal or right angular position with relation to the face of the planer head. In Athat instance, the free end of the ltable will be supported by an arm 27 pivotally secured in the base, as at 28. This arm is tilted out of the way of the table to assume the dottedlne position indicated at 127 a when it is not required. yVhen an angular or inclined position is desired, the free end of the table is supported by means of a link 29. The upperfend of the link is pivotally secured, asat 29a, to the lower side of the table. The lower end of the link is slotted, as indicatedat 30, and it straddlesy a clamping screw 31. This screw-is supported by, and extends through, twobearinglugs 32 and 33 formed on the base. The yl'ink passes between these bearing lugs and is clamped between the same. lfVhen the table has been adjusted to a desired angular position the clamping action is obtainedy by threading the bearing lug 33 and by form-ing a collar 34 on the screw which engages the outer face of the lug 32, the screw being extended and provided with a head 35 to permit it tobe conveniently manipulated.

At 36 a post is shown. This postextends through the table and it is vertically adjusted therein, it being secured by means of-a setscrew 37. Extending through the upper end of the post is a scribe 38. This is also Iadjustable, and is secured by meansy of a setserew 39. By longitudinally adjusting the scribe and by vertically adjusting the post, any position desired may bev obtained. The purpose of the scribe is to indicate the cut on the plaster cast. One end of the scribe is bent, as indicated at 40,?and this may bemoved into contact with the yocclusal surfaces of the teeth on the plaster cast, thus insuring a parallel cut on the under surfaceof the cast, shown in Fig. 3.

Fig. 3, it is only necessary to adjust the table B so that a substantially vertical cut is produced when ythe cast is moved against the face of the planer. The sides, the front and the rear :portion of the castarethen trimmed oihand whe-nthis has been accomplished fthe trimming opera-tion is completed, provided the base surface is substantially parallel with relation tothe teeth. On the other hand, if the basesurface is not parallel withrelation thereto, the` cast is turned on end and supported on the surface indicated at 46, and' the table is adjustedeo that it-assumesaright angular position to the face of the planer, this being'accomplished by releasing. the clamping screw 35 and by swinging the supporting arm 27 into place, `as shown fin Fig. 5. The plaster cast is then moved yagainst the 'tace of the planer and the base will thas vbe trimmed off at right angles to the end `of the cast.

' If thecast is freshand fairly moistwetting oftheplaste'r cast before trimming-is'lnot necessary, but if the plaster is dry itis preferable to wet vor meisten it before-the vtrimming operation, as considerable dust is otherwise,` produced.' The dust problem, however, isv not'serious' as the cover plate/.15 confines thek dust :and the'shavings tothe chamber 16, which in turn 'discharges through an openingll which,as previously stated, -is'-in communicwtionvwith a receptacle 4or the like placed beneath the table or support onv lwhich the laner'as-.a 'Whole is mounted. v

T e planing operation 'is rapid Aand vpractically any depth cutmay be obtained by=adjusting'the cutti-ngfe'dge l() with relationto the face of the planer. .Thefplastercast is held inthe hands of.the-operatorat all times during the planing operation. The cast 'is of course supported. by the table B, lbut it is held against the face of the planer by the-operator. He may thus swing the .plaster cast around, andas suchmay produce rounded surfaces or flat or angular surasas'xdesired. f.

By referringto Fig. '5,l itwi-llfbenoted that the face of the planer head is divided into two sections by the slot through which theplaner blade projects. The upper sec'- tion or face of the planer above the slotfprojects outwardlya slight distance beyond the lower section ofthe planer face Ithe distance being `approximately they thicknessfof the y ing tool movable `vertically and rotatably Y cut. This is desirable as the Work tok be trimmed or shaped is held by the operator against the face of thefplaner head and as f such can only be movedagainst the planerk face When this assumes its uppermostposition as shown in Fig.v 3, and `it cannot be moved forwardly unt-il the cutV has been completed and the planer again assumes its uppermost position. In other words, the Work to be planed is moved forward in a step-bystepV movement, each step being equal to the i depth or thickness of the cutfandk the yfor,- Ward movement merely takes place when the uppermost position of the planer is assumed s x or When the cutting edgeof the planer passes ent is:

y A 1. A device of the character described com- 1y prising a planer head having a planer face formed on one side thereof; a knife carriedfV Y by the planer head and projectingthrough the kplaner face; means for transmitting a perpendicular tothe path of travel of said p ane.

4. Adevice of the character described comprising a planer, headk having a planer face formed on one side thereof,said planer face having a slot formed therein and having the portion above said slot projecting forwardly of the portion below said slot, a knife carried by the'planer Vhead and projecting' through theslot, meansfor reciprocating the planer head and work supporting means adjacent the planer head.

5. In a device of the character described a planer. comprising a casting Y presenting an offset planer surfaceand having a slot formed in the offset portion, a planer blade projecting through the slot and angularly disposed with relation vto fthe offset planer surface, means for imparting reciprocal movement to lthe vplaner andwork supporting means adjacent theY planer.

k6. In a planer head of the Ycharacter described,ja lplaner `face formed on one side thereof, said planer face having two offset surfaces, a slot formed in said planer face between said surfaces and a knife carried by the planer heady and extending through said slot, the cutting edgeof said knife projecting beyond one yof said surfaces and terminating inthe same plane as the other surface.

j AFRANK H. HOWLETT.

reciprocal movement to the planer head; a

table disposedin front of the planer headto support the Work to be planed; a pivotalV support for onefend of the table; a support l for 'the opposite end of the table normally maintaining the face of the table at right angles to the planer face, and a secondsupport, said second support being adjustable to permit the face of the table to assumediiferent y angles with relation to the planer face.-

2. A device of the character described comprising a planer head having a'planer face formed on one side thereof; a knife carried by the planer head and projecting through the planer face; means for transmitting a reciprocalv movement to they planerhead; a

support the Work to be planed; and a scribvvith respect to said table.

3. A device for shaving `plaster casts com-y prising a base, guides secured toy said base, l

a planer head slidable on said guides, a crankshaft, a pitman connecting said planer head table Vdisposed in front of the planer headto y' i With said crank shaft, a plane secured tosaid planer head, a Work table positioned withone.

edge near the path of travel of fsaid'plane, a pivotal mounting meansgfor said table near said adjacent edge, and arest member pivot- 'Y ally vconnected to said base, adapted, when in '2 one position, .to support said table on a plane 

